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2025 Hazard Mitigation Plan <br />Kittitas Gounty, Washington <br />for Property Damage. A weighting factor of one (1) was assigned for Economic, Environmental, Essential <br />Operations, Future Development, and Climate Change. <br />4.4. FEMA NATIONAL RISK INDEX SCORES <br />The National Risk lndex (NRl) is a dataset and online toolto help illustrate the United States communities <br />most at risk communities for 18 natural hazards. These include: <br />a <br />a <br />a <br />a <br />a <br />a <br />Avalanche <br />Coastal Flooding <br />Cold Wave <br />Drought <br />Earthquake <br />Hail <br />. Heat Wave <br />. Hurricane <br />. lce Storm <br />. Landslide <br />. Lightning <br />o Riverine Flooding <br />r Strong Wind <br />. Tornado <br />. Tsunami <br />. Volcanic Activity <br />o Wildfire <br />o Winter Weather <br />All the hazards on this list are not applicable to Kittitas County; therefore, only those hazards with a <br />defined risk to the County will be included in this Plan. The NRI's goal is to fill gaps in available data and <br />analyses to better inform federal, state, local, tribal, and territorial decision makers as they develop risk <br />reduction strategies. <br />ln the NRl, risk is defined as the potential for negative impacts as a result of a natural hazard. The Risk <br />lndex is based on three (3) components - a natural hazards component (Expected Annual Loss), a <br />consequence enhancing component (Social Vulnerability), and a consequence reduction component <br />(Community Resilience). Using these components, the composite and hazard type Risk lndex values are <br />calculated for each community (county and Census Tract). Risk lndex values form an absolute basis for <br />measuring Risk within the NRI and are used to generate Risk lndex percentiles and ratings across <br />communities. ae <br />Table 4-17 illustrates the Risk lndex rating and score for Kittitas County. <br />Table 4-17. Risk lndex Score for Kittitas Gounty (FEMA National Risk lndex) <br />4.4.1. Expected Annual Loss <br />The Expected Annual Loss (EAL), the natural hazards component of the NRl, represents the average <br />economic loss in dollars resulting from natural hazards each year. lt is calculated for each hazard type <br />and quantified loss for relevant consequence types such as, buildings, people, and agriculture. The EAL <br />score and rating represents a community's relative level of expected losses each year when compared <br />ae Federal Emergency Management Agency. (2023). Determining Risk. Retrieved from <br />h ttps ://h aza rd s.fe m a. gov/n rild ete rm i n i n q -ri s k. <br />Kittitas County Very High 84.4 <br />Risk lndex scores are calculated using an equation that combines scores for Expected Annual Loss due to natural hazards, Social <br />Vulnerability and Community Resilience (Expected Annual Loss x Social Vulnerability / Community Resilience = Risk lndex). <br />Jurisdiction Rating Score <br />Chapter 4: Hazard ldentification and Risk Assessment 64